Typewriting machine



Aug. 31, 1943. L. B. HILL ET AL IfYPEWIFlI'IING MACHINE Original Fired Au 8, 1941 2 Sheets-Sheet 2 INvENTuRs r M H B E w E m A L m m 5 D H a N m r.

'ATTunnEY- l for patent forimprovements'injtypewriting mafandlparticularly pointed out. in the ap nded Patented Aug. 31, 1943 NITED? sTATE PATENT OFFICE V 'ryrnwm'rmo Macrame.

Laurence Hill and Edson'G. Moshi erQSyracus e, i N. Y., assignors to L. C.Smith & CoronaTypea writ rs. I New York;

Original application August Syracuse, N. Y., a corporation of s, 1941, Serial No.

3 406,016." Divided and this application Novemtel-29; 1941, Serial No. 420,9r2 V 7 Claims. (01. 197-440 This application is a. division of an application chines filed-by us on August 8, numbered 406,016. r i g v w The invention forming thesubject matter of the present application relates particularly to improvements in paper. feeding mechanism for typewriting machines. i i

The principal objects of the invention are to provide apaper feeding mechanism for typewrit ing machinesrsoconstructed as to facilitate rapid and accurate introduction otwork sheets orwebs 1941, and serially flnto the machine, to provide for arresting the fVleadingedge of such. a: sheet or web before it P reaches the writing. line of the machine; to provide 'ior registering "the leading edge of the arrested web or sheet: so that said edge will lie Figure 7 aview similar to Figure 6, but show.-

. ing the paper feed rolls cast ofi from the platen parallel to thewriting line, to provide for, release of the arrested an'd registered sheet or web, and to provide forfe'eding oi the released sheet or web across the writing line. The improved mechanism is particularly useful in connection with thetyping oi prlntedblank forms or websof suchforms. f a 1 F To the foregoing and other ends .which will "hereinafter appear, theinvention consists of the "features of construction, arrangements of parts,

and combinations of devices hereinait'erdescribed claims.

" :The preferredjembodiment of the invention is illustrated in the accompanying drawings wherein the improvements 'areillustrated. as embodied in the well-known L c Smithtypewriting machine. In thejdrawings: I

Figure 1- is a fragmentary planview ci the machine with certain'parts beingbroken away.

' Figure 2 is a tragmentaryview approximately on the line3-e-3 of 3 and. showing the stopping and registering means in efiective position.-

1 Figure 8 is a detail sectional view on the line 8-4 of Figure 2, showing the paper feed rollsin their operative position. .F 'igure9 is a detail sectional iew on the line 99 ofFigure;5., K Figure 10 is a detail Ill-l0 ofFigure 9. Only as muchof the known machine as is necessary to an understanding of the present invention is shownand will be described.

The machine comprises a main frame l5 upon whichis mountedtotravel transversely of the machine on the usual ball bearings. the usual platen carriage l6. Extending across. the front of the carriage, l6 and ailixed to the usual end plates otjthe carriage, is the usual bar l1 and the usual letter=spacescale-bar l8. On the bar 1'] may "be mounted the usual paper fingers l9.

sectional View on the line M The shaft ,of the usual cylindrical platen; 2 0 is engaged with the platen and showing the stopping and registering means in ineffective position. 7

Figured is-a detail: sectional view on the line H otFlg'ureZ showinglthe feed rollsand the stopping and registeringmeans; positioned as in Figure 5 rotatively journaled in the usual bearings 2|. at

opposite ends of the carriage, the shaft 22 of the platen extending horizontally transversely of the machine as usual. The usual pair of twirler knobsor finger wheels 23 are. connected with the platen at opposite ends of the carriage for rotating the platen in either direction. The usual 'linespaceratchet wheel is held to the platen adjacent .the left hand end of the carriage and is operablei by the usual line space mechanism,

'settable; to rotate the platen either 1, 2, or 3 tooth spaces of the ratchet 24. --This ordinary or standard line space mechanism. canbe of any suitable construction, the construction shown being that of the L C Smith machine hereinbefore left hand endof the carriage to limit the return movement of the line spacelever which is effected through the usual line :space lever return spring (not'shown) The usual link 28 is pivotally connected at its opposite ends with one arm of the line space lever at 29 and itsother endat 30 with the usual pawl carrier3 l The pawlcarrier 3| is pivoted on the carriage at 32 and the line space pawl 33 ispivotedon the pawl carrier at34. "The l ne space pawl carries the usual pin 35 which,

during the latter part ofthe return stroke of the line space lever, rides over the usual line space shown in Figure 8.

regulator 36 which is pivoted to the carriage at 3'! and is settable by the usual handle 38 (Figure 1) afiixed to said regulator to cause the pawl in the known manner to rotate the ratchet 24 either 1, 2, or 3 letter spaces.

mally urged between two adjacent teeth of the ratchet by the usual ratchet detent spring 52 (Figure 4) to hold the platen agalnstaccidentali' rotation.

7 By means of this usual line spacing mecha-' nism the platen may be rotated'by a full 'strokeof the line space lever either 1, 2, or 3 tooth spaces of the ratchet depending on the adjustment of the regulator 36 as is common in the art.

, Extending below the platen, and affixed to the carriage l6 and to the bar I 1' adjacent opposite ends of the platen, are two supporting brackets which are of U-shape in cross-sectiomthe side flanges of each of which bracketsil extend upwardly. Fixed to the flanges of this pair of brackets 51 are the ends of the usual two rods 43 and 44 which are spaced fore and aft of the machine and extend transversely thereof I parallel to the axis of the platen. Adjacent opposite ends of said rod 43 are pivoted the usual two arms 45, the front ends of which support the respective ends of the usual front feed'roll shaft 46 carryin the usual fron-t'feed sons 41. Adjacent opposite ends of the rear rod '44 are pivoted the usual two arms 48, the rear'ends of which support opposite ends of the usualfrear feed roll shaft 49 carrying the usual rear feed rollers 50.

" s The usual concave paper apron r deflector 52 is supported beneath the platen in the'usual manner, said apron having theusual pair of ears 53 journaled on the front feed roll shaft 46, and

smallroller 55 mounted on the rear feed r011 shaft 49. The usual two pressure springs 56, for normally urging the 'feed rollers toward the platen, are wrapped around the rods 43 and 44 adjacent opposite ends of said rods and each engaged adjacent its opposite ends beneath the front and rearfeed roll shafts, as more clearly The usual feed r011 cast-off casting off the feedrolls to facilitate the insertion of paper in the machine is provided. Each of the arms 45 has the usual rearward 'exten sion 51 overlap ing the usual forwardextenslon B8 of its companion arm 48. *A 'rock shaft 59. is journaled in the upstanding usages of the brackets i and in the right hand end of the platen" carriage l6. Afiixed to this rock shaft is the usual pair of tappets or cams 60 having forwardly extending noses closely overlapping" the usual-rearward extensions 6| of'arms 4B in the "cast-on, or paper-feeding, position of the feed rolls; Theriock shaftlSQ has the usual forwardly extending rock arm 62 which is located atthe right handendof thecarriage provided at its forward end with 'a laterallyf extending pin 63 engaged in the usual Loam: slot 6} in the paper feed roll 'cast oi'f lever 65. Lever fifiisj ournaled,

as usuahon the right hand end of the carriage at to swing fore and aft of the machine; The

cam slot 6 4, has the usual upward enlargement 64a. in its upper edge adjacent the forward end oft'he slot to releasablylatch the feed rolls in Said pawl has theusual arm 39 engageable with the ratchet 24 to limit the operating stroke of the line space lever and prevent overthrow of ratchet 24.

The usual spring-urged detent for ratchet 24 is pivoted on the carriage at 4| and is nor mechanism for *these arms to lowerthe rear feed rollers, therel0" gage extensions 51 of arms and swing the by causing the extensions 58 of arms 48 to enfrontfeedroll'ersaway from the platen. When "the {remand rear forward rollers are swung downwardly j away from the platen, the paper apron 52 is" also lowered, as will be obvious.

Also mounted vonithe carriage in the usual mannerfis thefusual paper table 6! for directing the paper forwardly and downwardly between the; platen and the paper apron 52.. A portion of this paper table 61 is shown in Figures 1, 6

" It will be obvious that'the detailed construction of thepaper feedmechanism rabove dehaving the usual lug 54 supported on the usual scribed, which is the paper feed mechanism of the known L C Smith machine, may be varied.

The" new fiaaturesofthe machine whereby the objects-of the invention. hereinbefore pointed out are accomplished will now be described.

; Stopping and registeringme'ans is provided for squaring the leadingedgebf the. sheet or web of printed forms with the writing line. ofv the machine and arresting. introduction of the web into the machine ata predetermined distance to the-rear of the writingline.

along the periphery. of the platen longitudinally of the platen'slightly'labove the horizontal plane :in which the axis of the platen lies.

The stopping means comprisesjtwo registerin stops ts located adjacent-opposite endsof the platen and extending beneath the-platen. Each stop'6'9 is formed of'a'zbar of thin spring steel having its forward end bent upwardly for contact with the underside of the platen when thestop is in effectiveposition. Each; stop bar 69 is adjustablyfixed intermediate its ends to; an axle 'Hl by means of a screw H which extendsthrough a longitudinal slot, "12 in thebar; v r The arm of each 'stop'bar forward of theaxle ill is movable up and downthrough the adjacent one of two fore-'and-aftextendingslots 13', in thepaper apron 5,2; Screws 'llareaccessible through slots 13," when the platen is .removedqfrom-its bearingsftd permit each stop- 69 to be adjusted fore and aft of the machine, or transversely of the platen. Each stop bar 69 is heldEbyits-anchoring screw'll ina notch-'ld' iFigure 9): formed in the axle '1!) of the 'stoprbanju The longitudinal 'sideedgesofeach stop barsengage the side Walls of the lot'inits axle to :prevent accidental turning of the stop-bar about the shank of the screw '11 Each stopbar 69 extends rearwardly from its axle 'liLand two tappets l5 which'are fixed on the rock: shaft 59 overhangtherearwardly [extending arms of the two stop bars 69. 1 25'.

The tappets F5, in the normal position of; the hand lever 65, are spacedslightly farther above the rear ends of the stop bars'69 than thetappets 60' are spaced above the extensions 51 of arms 48.

lft' is thus possible to rock the" hand 'lever 65 forward slightlyto an "extent sufficient to relieve the pressure of the paperlfeedrolls'on the platen to permit straightening of a paper sheet'in the machine without 'throwingthestops 69 into sheet In the machine illustrated, the writing line extends horizontally shown in Figures 5 and 6;

, of the adjacent bracket 5l.

stopping position. It will be obviousthat, when the arm 65 is thrown completely forward from the positionshown in Figure 3, both sets of paper reed rolls" and so will be castoiffrom the platen intothe position shown in Figure 1'7 and the two stops 69 will be rocked topress their upturned forward ends yieldingly against the under side of the platen into theposition shown in s re' ,l f

In this position of the feed rolls and stops, the paper sheet or web maybe introduced into" the machine down over the paper table B'I-and betweenthe platen and the apron 52 until the front edge of the sheet orweb isarrested and is registered oisduared with thewritingfline of the machine by contact of said edge with, the upturned forward ends of the stop arms 69. -The lever Siis releasablyheld to maintain, the stops and the paper feed rolls in theposition shown inFlgure 7 until thelever 65 ispushed rearward ly. When the 1ever65is pushed rearwardly to its normal position shown-in Figure 3, the feed rolls and paper apron arerestored to normal positlon to press the sheetfto the platen; and-the forward ends of the stops 69 move downwardly through" the slots 13 into the inefiective position I To slmpllfy the construction and mount ing of the two stops 69 and facilitate assemb y thereof in the machine, the axle "of eachstop has a :9

reduced cylindrical bearingportion 16 inserted in a circular bearing aperture in one of the upstanding flanges of the adjacent bracket 5i: and

notch or slot18 in the otherupstanding flange the bearing portion 11 of eachaxle,the axle is formedwitha cylindricalhead 19 provided ad Jacent the outer face or the slotted flange of bracket 5| with a kerf BU throughjwhich extends the rear arm of one of two springs 8|. The rear arm of each spring 8|, in the normal position of the stops 69 and feed rollers shown in Figure 5,

engages the'frontend edge of the bottom of kerfs 80 in axles III as shownin Figure 10. Each spring It is provided intermediate its ends with a downward bend or bow 82 in which is seated the adjacent end of rod 44, while the forward end of each spring 8| isengaged over theadjacent end of the rod 43. The springs 8| thus are normally tensioned to urge ach of the stops 69 to their ineffective position and hold them there. The

springs 8| also releasably hold the axles of the stops 69 in their mountings in brackets 5|. The ends of rods 43 and 44 are grooved as indicated in dotted lines in Figure 5 toreceive the springs,

It will be observed that the stop 69 will arrest the leading end of a work sheet or web being introduced into the machine at a predetermined distance from the writing line and said stops also permit the operator to square the leading end of the work sheet with the writing line.

It will be observed that the stopping levers 69 are formed of thin spring steel and that their upturned sheet-arresting forward ends are resiliently pressed againstthe under side of the platen by the tappets 15 when the levers are moved into effective stopping position, thereby insuring arrest of thin sheets without liability of damaging the platen.

When the stops are moved to ineffective posi- Outwardly beyond neath' the platen for movement toward and from the platen, spring means constantly urging said "adjacent its other end each axle has a reduced cylindrical bearing portion" engaged in an open supporting means to move the feed rolls and apron toward the platen; a rock shaft journaled on the carriagebehind the platen, tappets on said 'shaftoverhanging'and engageable with parts of said supporting means to force the feed rolls and apron downward away from the platen when said shaft is rocked in one direction, paper stop levers journaled intermediate their endson the carriage to rock about an axis extending parallel to the platen and having upstanding forward end POI? tions adapted to abut the under side of the platen behindthe writing line of the machine andalso having rear ends extending toward said rock' shaft, tappets on said rock shaft overhangingand engageable with the rear ends of said stop levers to rock theupstanding forward end portions of said levers against the platen, spring means normally urging said forward endportions of the stop levers downward away from the platen, and

means operable to rock said rock shaft from a position in which said feed rolls are coactive with the platen to feed paper and said stop levers are ineffective to arrest paper to a position in which the stop levers are rendered effective and the feed rolls are rendered ineffective, said apron having openings through which the stop levers are movable.

2. In a typewriting machine as claimed in claim ,1, an arrangement of the tappets on the rock shaft whereby the feed rolls may be moved slight ly away from the platen before the stop levers engage the platen. I 1

3-. In a typewriting machine, the combination of a platencarriage, a roller platen jcurnaled on the carriage, paper feed rolls spaced around the platen, a paper guiding apron for guiding paper between said rolls and the platen, means for resil iently urging said rolls to the platema plurality of resiliency flexible sheet registering stops spaced apart longitudinally of the platen and each havbearing portions of the stop axle and also havtion, an arrested and registered sheet or web may thereafter be fed across the writing line by ing for each stop an open bearing slot receiving the other reduced bearing portion of the stop axle, the axle of each stop having a head adjacent the latter bearing portion of its axle provided with a. keri whichrextends transversely of the axle adjacent the open end of the open bearing slot for the axle, spring arms on the carriage engaged in the kerfs of the stop axles to hold the axles releasably in their bearings and urge the stops away from the platen, and means operable at will to shiftthe feed rolls away from the platen and concurrently resiliently press the sheet registering stops against the platen, said paper guiding apron having openings therein through which said stops are movable into and out of contact with the platen. I

4. Ina typewriting machine, the combination of a platen carriage, a roller platen journaled on the carriage, a resiliently flexible sheet stopping lever, fulcrumed intermediate its ends on the carriage for rocking of said lever about an axis parallel to the axis of the roller platen, one arm of said leverv having itsfreeend bent toward the platen to form an abutment for engagement by a paper sheet, spring means urgingsaid'stopping lever about its. axis to yieldingly maintain the bent end of the lever out of contact with the platen, manually operable mean on the carriage engageable with the other arm of said lever to resiliently press the bent end of said lever against the platen, and means on the carriage for guidingpaper sheets between the platen and; said lever when the bent end of the lever is held away, from the platen and for guiding such sheets against the bent end of the lever when the latter is engaged with the'platen.

5. In a typewriting machine, the combination of a platen carriage, a roller platen journaled' on the carriage, a support journaled onthe carriage torock about an axis parallel to the platenaxis, a two-arm sheet stopping lever, means fordetachably holding said lever intermediate the ends of the lever to said support in difierent endwisely adjusted positions of the lever relatively to said support, one arm of said lever having, an abut ment extending towardthe platen, manually operable means on'the carriageoperable uponthe other arm of said lever to cause said abutment to contact'the platen for stopping a; sheet, spring means for yieldingly holding said lever and its support with the abutment out of contact with the platen'and means on the carriage for guiding paper sheets between the platen and said abutment when the abutment is held out of contact with the platen and for guidingsuch sheets against the abutment when the latter is engaged with the platen.

6, In a visible writing typewriting machine, the

v combination of a platen carriage, a, roller platen journaled on the'carria-ge for rotation about a horizontal axis, front and rear paper feed rolls coactive with the lower portion of the platen, a paper deflecting apron mounted on the carriage under the platen to guide paper between said platen and feed rolls, a plurality of two-arm paper stop levers each having one arm thereof extending forward under the platen and also having the other arm thereof extending rearward, each said lever being formed of resiliently flexible material and having its forwardly extending arm formed with an abutment extending toward the platenfintermediate the lines of contact I or the front and rear feed rolls with the platen,

supporting axles one for each stop lever, detach ably journaled on the carriage for rocking thereof about an axis parallel to the platen axis, means for holding each stop lever indifferent endwise adjusted positions thereof to its axle, spring means associated witheach lever for normally yieldingly holdingthe lever-with its abutment rocked away from the platen, a rock shaft journaled on the carriage behind the platen forroch ing about an axis parallel to the platen axis, tappets on said rock shaft overhanging the rearwardly extending arms of thestop levers, and manually operablemeans on said carriage for rocking said shaft in a direction to depress said tappets to cause the latter to rock the stop'levers to resiliently press the stop lever abutments against the platen, said'apron having openings through which the stop lever abutments are mov able into and out of contact with the platen.

- 7. A typewriting machine-having a rotative platen, a guiding apron associated with said platenfor guiding aboutthe platen paper sheets "introduced into the machine, a plurality of paper sheet registering stops spaced apart longitudinally of the platen, each stop having an axle eX-' tending parallel to the axi of the platen and an abutment extending-toward the platen, said apron having openings therein through which the stop abutments' are movable into and-out of'contact with the platen, means associated with'each step providing a'cylindrical bearing and an open slot bearingfor the stop axle, each stop axle hav, ing at one end a reduced cylindrical bearing portion engaged in the,cylindricalbearingjfor said axle and having adjacent its opposite end both a kerf extending transversely of the axle and its open slot bearing adjacent the open end of the slotbearing and also areduced' cylindrical bearing portion seated in the open slot bearing, a resilient arm supported adjacent each axle and engaged in the kerf in the axle to releasably hold the axle inits bearingsand normally resiliently hold the stop rocked toaposition in which the stop abutment is at the opposite side of the apron from that at which the platen is located, and manually operable means for rocking the stops simultaneously to engage theiriabutments with the platen. '1

- LAURENCE B.'I-IILL.

EDSON G. MOSHIER. 

